#pragma once

#include <QObject>
#include <QHash>
#include <QString>
#include <QStringList>
#include <QTextCodec>

class DocumentManager : public QObject
{
    Q_OBJECT

public:
    explicit DocumentManager(QObject *parent = nullptr);
    ~DocumentManager();

    // 文档管理
    int createNewDocument();
    int openDocument(const QString &filePath);
    bool saveDocument(int docId);
    bool saveDocumentAs(int docId, const QString &filePath);
    void closeDocument(int docId);

    // 文档信息
    QString getDocumentTitle(int docId) const;
    QString getDocumentFilePath(int docId) const;
    QString getDocumentContent(int docId) const;
    QString getDocumentEncoding(int docId) const;
    QString getDocumentLanguage(int docId) const;
    bool isDocumentModified(int docId) const;
    bool isDocumentUntitled(int docId) const;

    // 文档内容操作
    void setDocumentContent(int docId, const QString &content);
    void setDocumentModified(int docId, bool modified);
    void setDocumentEncoding(int docId, const QString &encoding);
    void setDocumentLanguage(int docId, const QString &language);

    // 获取所有文档
    QList<int> getAllDocumentIds() const;
    int getDocumentCount() const;

signals:
    void documentCreated(int docId);
    void documentOpened(int docId, const QString &filePath);
    void documentSaved(int docId, const QString &filePath);
    void documentClosed(int docId);
    void documentModified(int docId, bool modified);
    void documentTitleChanged(int docId, const QString &title);

private:
    struct DocumentInfo {
        int id;
        QString title;
        QString filePath;
        QString content;
        QString encoding;
        QString language;
        bool modified;
        bool untitled;
    };

    QHash<int, DocumentInfo> m_documents;
    int m_nextDocumentId;
    static int s_untitledCounter;

    QString generateUntitledName();
    QString detectLanguageFromExtension(const QString &filePath);
};